Yet another fabrication—often repeated by anti-masons and conspiracy theorists—is the claim that Albert Pike was in correspondence with Giusseppe Mazzini. First claimed by Edith Starr Miller, the accusation was later repeated by William Guy Carr, who cited Cardinal Caro y Rodriguez of Santiago, Chile, author of The Mystery of Freemasonry Unveiled. In Pawns in the Game Carr claims that this correspondence was on display in the British Museum but didn't provide the source of his information. Later, in Satan, Prince of this World, Carr includes the following footnote:

"The Keeper of Manuscripts recently informed the author that this letter is NOT catalogued in the British Museum Library. It seems strange that a man of Cardinal Rodriguez's knowledge should have said that it WAS in 1925".

In fact, the accusation—although not the specifics— can be traced to the earlier writings of the self-confessed hoaxsters Domenico Margiotta and Leo Taxil. There is no evidence that any correspondence ever existed. The British Museum has recently confirmed in writing to researcher Michael Haupt that such a document has never been in their possession.